Ship&#39;s hatch



S. HAY

SHTPS HATCH Sept. 16,y 1941.

4 Sheets-Sheet 1 Qn N Filed May 24, 1939 R GYM Anv MH, .VLN n@ IPI E. T am VI 6 Nm www l .Il l

@s N ATTORNEYS Sept. 16, 1941. s HAY 2,256,087

SHIP S HATCH INVENTOR .S1-:Pm: HAY

TroR/VEYS S. HAY

SHIP S HATCH Sept. 16, 1941.

Filed May 24, 1939 4 Sheet-Sheet 3 mvEN-roR STEPHEN HAY BWM@ f? ro'e/vsrs www Sept. 16, 941. 5 HAY SHIPS HATCH Filed May 24. 1959 4 Sheets-Sheet 4 INVENTOR .STEPHEN HAY wmf@ l Patented Sept. 16, 1941 SHE'PS HATCH 'Stephen Hay, London, England, assigner to The Gras Light & vCoke Company, London, England,

a British lcompany Application May 24v, 1939, Serial No. 275,429 In Great Britain September 13, 1938 3 Claims.

This application `corresponds to the application of I'he Gas Light & Coke Company and Stephen Hay, Serial No. 25,017/37, which was led in Great Britain on September 13, 1938.

This invention is for improvements in or relating to a ships hatch having a folding hatchcover of the kind in which a cover is hinged to a hatchway frame and is raised or lowered by a screw-and-nut mechanism, on each side thereof, of which the screw is rotatably mounted on the deck or hatchway frame and is arranged to eX- tend along the side of the frame.

According to this invention, a ships hatch of of the kind referred to is characterized in that each nut or a part secured thereto is arranged to engage and move along a track fixed to said cover, which track and screw are inclined in relation to one another in a vertical plane of the horizontal and, when the hatch is closed, are disposed within the height of the hatchway frame.

The track may be formed on a downwardlyextending flange on said cover-part. The nut or the part secured thereto may be provided with a roller for engaging said track.

.In any vof the arrangements referred to above, two lead-screws may be geared together.

'I'he cover may be formed in two parts hinged together so that the hinge axis is parallel to the hinge which secures one part to the hatchway frame and guide means may extend along the hatch and may be arranged to support the outer end of the other part and the aforesaid nuts or parts secured thereto may be arrangedito engage tracks on the last-mentioned par-t.

Means are provided for forming a fluid-tight joint between adjacent edges of the `cover-parts, which means comprise a projecting lip extending along the edge of at least one cover-part in each pair of parts, a resilient strip supported on a rigid backing carried by the other cover-part, so as to extend along the edge thereof, and a plurality of screw-jacks adapted to press the lip and resilient strip together. Preferably each cover-part is provided with a projecting lip, which lips are arranged to extend into an inverted channel-member carriedV by the aforesaid screw-jacks, which channel-member conta-ins the resilient sealing material which may be pressed into engagement with said lips by said jacks.

Means may be provided for limiting the extent of movement of the screw-jacks so as to limit the extent of compression of the resilient sealing material when brought into engagement with said lips.

Resilient strips of sealing material are also provided for `sealing the top of the hatchway frame and the side edges of the cover-parts when the hatch is closed and clamping bolts Vare provided for compressing those parts together. For example, the strips of sealing material may be accommodated in channels formed on the underside of the cover-parts along the side edges thereof.

A socket may be formed at each end of each of the aforesaid lips and is adapted to be disposed over the top of the hatchway frame when the hatch is closed, a resilient block of sealing material is secured in each socket and is adapted to engage a corresponding block in an adjacent cover-part and is also adapted to engage the top of lthe hatchway frame. The aforesaid `strips of resilient sealing material, which extend along the side edges of the cover-part, are arranged to abut at their ends against the aforesaid blocks of resilient material in said sockets.

The following is a description of one form of hatch according to this invention, reference being made to the accompanying drawings, in which- Figure 1 is a side elevation of slightly more than one-half of the hatch;

Figure 2 is a plan of the arrangement shown in Figure l;

Figure 3 is a side elevation of the hatch showing a pair of cover-parts in the position which they assume at one end 0f the hatch when the hatch is open;

Figure 4 is an end elevation of the hatch look-v ing in the direction of the arrows in Figure 2;

Figure 5 `is an enlarged `side elevation of the hatch in the region of the hinged joint between two of the cover-parts and showing, in section, the sealing means,

Figure 6 is an enlarged section on the line 6-6 of Figure 1, showing the details of the lifting mechanism,

Figure 7 is a perspective view of a sealing device provided at each extremity 4of those edges of the cover-parts which are brought together when the hatch is closed and which sealing devices are arranged immediately over the hatch combing,

Figure 8 is a planA View showing two of the sealing devices co-operating with one another when the hatch is closed,

Figure 9 is a section on the line 9-9 of Figure 2 through a part of the cover and hatchway frame, and

Figure 10 is a sectionl on the line www of.

Figure 2, also showing a part of the cover and back of the hatchway frame. l

u The hatch comprises the usual rectangular hatchway frame I which projects from the ships deck across which extends two folding hatch-covers each comprising two cover-parts I I and I2. The cover-part I2 is secured along one edge by a number of hinges I3 to one end of the hatchway frame. The two adjacent edges of the cover-parts I I and I2 are secured together by hinges I4. VEach free corner of the cover-part II has secured to it a bracket I5 on which is Y mounted a roller I6. Therroller is arranged to engage a track I'I formed o n the hatchway frame below the upper edge thereof and on the inner Y side ofthe frame (as seen in Figure 9). The

track is provided with a ramp 9 (shown to the right of Figure 1) at that end thereof which is engaged by the roller I6 when the cover-parts plates 2B and 2|. The side-plates are so shaped as to provide inclined upper edges 22. Rotatably mounted in the end-plates 2G and 2l is a'leadscrew 23 which is arranged parallel with the edges 22. The lead-screw is engaged by a nut 2li provided withV an upwardly-extending arcuate arm V25. A roller 26 is arranged on either side of the arm adjacent the nut, which rollers are arranged toengage the inclined edges 22 of the side-plates I9.' YThe upper extremity of the arcuatearm 25 is forked at 2'I and a roller 28 is rotatably mounted within the fork, on a pin 29 which extends through and projects from the sidesj of the fork. -The roller 28 is arranged to engage a track 30 secured to the cover-part I2. YThe track is in the form of an invertedchannel and the roller 28 is arranged to engage the bottom of the channel. VSidev members 3 are secured to the both between the adjacent edges of the coverparts II and I2 and between the edges of the Y cover-parts II of the two pairs of cover-parts, in the manner shown in Figure 5. Each of the adjacent cover-parts may be provided with a suitable upstanding lip 38 which lips are arranged to extend into an inverted channel member 39. y A

A strip of resilient sealing material 4I, such as rubber, is arranged Within the channel-member and is arranged to engage the upstandingV lips 38. number of screw-jacks 43 each provided atY its upper end with a handwheel 44 and at its lower end with a'ball-and-socket connection 43. Each screw-j ack extends through an internally threaded mock is fixed to a bracket-member 42 which channel and are slotted at-3I to receive the ends of the pins 29 whichextend through slots and havesecured to their 'extremities locating collars 1. As will be seen from'Fig. 1 vboth theleadscrew and the track are inclinedin relation to the horizontal. The end of the lead-screw 23 nearer the hinge I3 has secured to it a bevelpinion 32 yon the outer side of the end-plate 29. The bevel-pinion is engaged by a bevel-gearwheel 33 secured on al cross-shaft 34. Thus, the

twolead-screws on either side of the hatchway frame are geared together.v The cross-shaft Yis carried by suitable bearings VV35 provided with greasers VIi and mounted on bracket-plates 36 xed to the end wall ofthe hatchway frame.v

Said cross-shaft may be provided with a suitable operating handle 3'1. Alternatively, the shaft may be coupled through a suitable clutch to a prime mover. Y

The pitch ofthe lead-screw is such that axial thrust upon the nut 4cannot rotate the leadscrew, and thus thecover-parts are automatically locked in any position against movement except that imparted to them by direct rotation of the lead-screw. 4

A similar pairof cover-plates and mechanism for operating them are arranged atthe other end of the hatchway frame, and when both pairs of cover-parts are in their extended rpesitionas shown in Figures 1 and 2, the two cover-parts II are closelyadjacent one another. 'f-A similar water-tight jointmay be provided is secured to and extends across the width of one of the cover-parts. The distance between the handwheels M and the blocks 48is such that the resilient packing v4I shall not be compressed beyond a predetermined amount-when the'screwjacks are fully screwed-home. Y

A flanged strengthening plate 49 is secured to the underside of each cover-part (see Figure-9 along each side'thereofso that the flanged portion 53 is arranged on the'outside ofthe hatchway frame il). Secured tothe flange 50 are a number of brackets 53 formed with slots 5 for receiving clamping bolts 5I "pivoted at 54 to the bottom of the hatchway-frame. The clampingr bolts are providedwith hand-nuts 55, whereby the cover-parts may be clamped in position.

Extending along the f underside of each strengthening piane 4e is a rib sa which, together v with thev aforesaid flange 53, form a channel in which is located a strip of resilient material 51,

such as rubber, whichk provides an effective seal Withthe top of the hatchway frame I6 when the clamping bolts are tightened. Each of those cover-plates which are hinged to the lhatchway y frame is reinforced by` a strengthening plate 58 on the underside thereof y adjacent the hinge, as shown in Figure 10. AnVangle-member 59is secured to the u nderside'pfVV the strengthening plate and extends on'the outside of thev hatchway frame betweenthe frame andthe lhinge axis.

There is also secured'to the strengthening'plate Y against the hatchway frame by means of clamp- Y ing bolts 5I hinged to frame and engaging slotted bracket 53 se'cured'to the cover-parts, It may not be possible to arrange the strip 5'! o f sealing materialalong the sides of adjacent cover-parts to abut one another sufficientlyY to provide a water-tight joint and in order to overcome this difficulty.'sealingl means are provided such as areY shown in Figures? and 8. It will be noted that the fupstanding lips 38 are not con- "tinued right up to the Vedge of the cover-plate and that slots are cut in the cover-plate and in the flanged strengthening plate 49 so as to receive a socket-member 52 which is disposed immediately above the top of the'hatchway-frame I0. The socket memberv maybe welded to the cover-part and strengthening plate andis pio-- The channel-member is carried by aV vided with a vertically extending undercut channel 63 which is arranged to receive a hollow rubber block E4. In cross-section the rubber block is D-shaped in conguration. The bottom wall of the channel member 39 may be arranged to extend over and in Contact with the tops of the sockets.

As will be seen from Figure 8, when two coverparts are brought together, the two D-shaped rubber blocks are arranged to abut one another. The rubber blocks are of such a length as also to abut against the top of the hatchway frame iii. As shown in Figure 8, the rubber strip is arranged to abut the side of the rubber block, and the bottom of the socket is cut away for that purpose.

Alternatively, strengthening plates may be provided on the outer face of the cover-part at the corners near the ends of the upstanding lips 38. Although the cover-parts are shown hat, they may, if desired, be provided with a carnber across the width of the hatchway.

Secured to the hatchway frame are a number of toggle clamping bolts 5i which are arranged to swing about horizontal axes so that they may be brought into slots 52 formed in ilanges 53 attached to the cover-parts whereby the coverparts may be clamped securely on to the resilient sealing material 5b. The hinges i3 are so constructed as to permit movement between the two parts of the hinge in the direction of the 'clarnping movement.

The cover-parts may either be provided with a camber as shown in the drawings, or may be at.

I claim:

1. A ships hatch comprising a hatchway frame, a cover adapted to extend over said frame, a hinge interconnecting the cover and frame, a lead screw extending along a side of said hatchway frame, the axis of rotation of said lead screw extending transversely to said hinge, means for rotating said lead screw, a track on the cover below the upper surface thereof and above said lead screw, said track and lead screw, wh-en the hatch i is closed, lying within the height of the frame, said track and lead screw, when the hatch is closed, lying on opposite sides of and each being inclined with relation to a horizontal plane so that they diverge as they extend from the hinge axis, a nut on the lead screw restrained against rotation and an arm operatively secured to the nut and extending between said nut and track.

2. A ships hatch comprising a hatchway frame, a cover adapted to extend over said frame, a hinge interconnecting the cover and frame, a lead screw extending along a side of said hatchway frame, the axis of rotation of said lead screw extending transversely to said hinge, means for rotating said lead screw, a downwardly extending flange on the cover shaped to provide a track lying below the upper surface of said cover and above said lead screw and in a vertical plane passing through said lead screw, said track, when the hatch is closed, being inclined upwardly as it extends from the hinge axis, said lead screw being inclined downwardly as it extends from the hinge axis, a nut on the lead screw restrained against rotation and an arm operatively secured to the nut and extending between said nut and track, said lead screw and track lying within the height of said frame when the cover is closed.

3. A ships hatch comprising a hatchway frame, two cover parts hinged together and adapted to cover said frame, a hinge interconnecting one cover part to the frame, guide means extending along the hatch and adapted to support the outer end of the other cover part, a lead screw extending along a side of said hatchway frame, the axis of rotation of said lead screw extending transversely to said hinge, means for rotating said lead screw, a track on that cover part which is hinged to the frame, said track lying below the upper surface of the cover and above said lead screw, said track and lead screw, when the hatch is closed lying within the height of the frame, said track and lead screw, when the hatch is closed, lying on opposite sides of and each being inclined with relation to a horizontal plane so that they diverge as they extend from the hinge axis, a nut on the lead screw restrained against rotation and an arm operatively secured to the nut and extending between said nut and track.

STEPHEN HAY. 

